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# 8253M-HD250-Q2 - High Output Alternator, 6G, 250 Amps, Power Stroke Diesel, Quicktifier 420 Triple Rectifier Kit


USA Made, Ford Motorcraft type 6G series 250 high amp, large case Alternator with Heavy Duty Voltage Regulator and Heavy Duty Dual Bridge Rectifiers. This unit is built in the USA with NTN bearings which are the OE Bearings used by Ford, Heavy Duty Bridge Rectifiers rated together at 630 amps, Stators out of Georgia, Heavy Duty Voltage Regulators and all Top Quality Components.


From about 1994 until 1997, the Ford F-Series diesels used the 3G series alternator and it was available in both small and large case options. After 1999, they switched the F-Series diesels to the Super Duty lineup of F-250, F-350, F-450, and F-550 models. With this model change, they also made the small case 6G the only alternator option, though there was a dual alternator option that either paired up two small case 6Gs or a 6G and a 4G. Our large case alternator, mounting type 8253M, replaces these small case alternators and gives you:

More Power at Idle

The larger diameter stator and overall increased mass allows the alternator to generator more power at slower speeds. Where a small case alternator only starts puting out extra power at near highway speeds, our large case units put out as much as 60% rated output at 650 RPM idle.

Extra Durability

The larger mass of the unit gives it increased heat dissipation and absorption. Basically, it takes more energy to heat up the larger unit. Combine this with an extra heavy duty copper bridge rectifier and you have an extremely durable alternator.

Fits 1999 and up Ford Diesel motors. A must for Snow Plows, Police and Emergency, Off road Vehicle and any other high electrical demand situations. For Extreme use situations see our other high output, 6G compatible alternators with Quicktifier external rectifier added for maximum reliability.

Replacement For: 6G Type Alternators

Vehicle Fits
Year Range Make and Model Engine Option
'99 to '03 Ford Windstar Van 3.8L 232CID Essex V6
'04 to '07 Ford Freestar Van 3.9L 237CID & 4.2L 256CID Essex V6
'04 to '07 Mercury Monteray 4.2L 256CID Essex V6 256 CID
'98 to '03 Ford E-Series Van 7.3L 444CID Power Stroke Diesel w/ Dual Alternators
'99 to '03 Ford F-Series Super Duty 7.3L 444CID Power Stroke Diesel
'04 to '07 Ford F-Series Super Duty 6.0L 365CID Power Stroke Diesel and 4.2L 256CID Essex V6
'00 to '05 Ford Excursion 7.3L 444CID and 6.0L 365CID Power Stroke Diesel
'01 to '02 Mercury Cougar 2.5L 155CID Duratec 25 V6
'01 to '04 Ford Escape 3.0L 181CID Duratec 30 V6 Gas
'01 to '04 Mazda Tribute 3.0L 181CID Duratec 30 V6 Gas
'00 to '07 Ford Focus 2.0L 122CID and 2.3L Duratec DOHC L4

Replaces: Lester 8253, 8408, 7797, 8529, 8530, 7796, 7798, 7799, 8254, 8259, 8261, 8306, 8316, 8317, 8406, 8447, 8476, 8479